Apparatus

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sensors Mode-S transponder

A87BB9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N646CB · CESSNA 172 Skyhawk · operated by JEFFERY & WEISS HOLDINGS LLC

Hex
A87BB9
Octal
52075671
Decimal
11,041,721
Country
US
Tail
N646CB
Type
C172
No current signal · last broadcast 4h ago
Flights observed
316
Distinct callsigns
1
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S A87BB9.

Country allocation

The ICAO 24-bit address A87BB9 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
N646CB - 316 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N646CB - Jul 24, 05:25 UTCJul 24, 06:10 UTC45m
2026-07-24 N646CB - Jul 24, 02:55 UTCJul 24, 04:25 UTC1h 30m
2026-07-23 N646CB - Jul 23, 23:45 UTCJul 24, 00:35 UTC50m
2026-07-23 N646CB - Jul 23, 20:50 UTCJul 23, 23:00 UTC2h 10m
2026-07-23 N646CB - Jul 23, 18:25 UTCJul 23, 20:05 UTC1h 40m
2026-07-23 N646CB - Jul 23, 01:50 UTCJul 23, 02:50 UTC1h 0m
2026-07-23 N646CB - Jul 23, 00:05 UTCJul 23, 00:40 UTC35m
2026-07-22 N646CB - Jul 22, 21:50 UTCJul 22, 22:50 UTC1h 0m
2026-07-22 N646CB - Jul 22, 19:25 UTCJul 22, 20:20 UTC55m
2026-07-21 N646CB - Jul 21, 21:35 UTCJul 21, 22:30 UTC55m
2026-07-21 N646CB - Jul 21, 19:40 UTCJul 21, 20:40 UTC1h 0m
2026-07-21 N646CB - Jul 21, 17:20 UTCJul 21, 18:00 UTC40m
2026-07-21 N646CB - Jul 21, 15:35 UTCJul 21, 16:25 UTC50m
2026-07-21 N646CB - Jul 21, 04:00 UTCJul 21, 06:25 UTC2h 25m
2026-07-21 N646CB - Jul 21, 01:45 UTCJul 21, 02:50 UTC1h 5m
2026-07-20 N646CB LGB → LGB Jul 20, 21:50 UTCJul 20, 23:10 UTC1h 20m
2026-07-20 N646CB - Jul 20, 19:25 UTCJul 20, 19:40 UTC15m
2026-07-20 N646CB - Jul 20, 03:50 UTCJul 20, 06:45 UTC2h 55m
2026-07-20 N646CB - Jul 20, 02:45 UTCJul 20, 03:10 UTC25m
2026-07-19 N646CB - Jul 19, 22:15 UTCJul 19, 23:35 UTC1h 20m
2026-07-19 N646CB - Jul 19, 18:40 UTCJul 19, 20:50 UTC2h 10m
2026-07-19 N646CB - Jul 19, 01:45 UTCJul 19, 02:40 UTC55m
2026-07-18 N646CB - Jul 18, 17:25 UTCJul 18, 18:20 UTC55m
2026-07-17 N646CB - Jul 17, 22:15 UTCJul 17, 23:00 UTC45m
2026-07-17 N646CB - Jul 17, 16:59 UTCJul 17, 17:50 UTC50m
2026-07-16 N646CB - Jul 16, 22:10 UTCJul 16, 23:10 UTC1h 0m
2026-07-16 N646CB - Jul 16, 20:00 UTCJul 16, 20:49 UTC50m
2026-07-16 N646CB - Jul 16, 17:25 UTCJul 16, 18:29 UTC1h 5m
2026-07-16 N646CB - Jul 16, 00:35 UTCJul 16, 01:45 UTC1h 10m
2026-07-15 N646CB - Jul 15, 19:30 UTCJul 15, 20:45 UTC1h 15m
2026-07-15 N646CB - Jul 15, 16:55 UTCJul 15, 18:20 UTC1h 25m
2026-07-15 N646CB - Jul 15, 15:00 UTCJul 15, 15:55 UTC55m
2026-07-15 N646CB - Jul 15, 04:45 UTCJul 15, 06:25 UTC1h 40m
2026-07-15 N646CB - Jul 15, 01:50 UTCJul 15, 03:00 UTC1h 10m
2026-07-14 N646CB - Jul 14, 18:35 UTCJul 14, 19:45 UTC1h 10m
2026-07-14 N646CB - Jul 14, 04:15 UTCJul 14, 04:50 UTC35m
2026-07-14 N646CB - Jul 14, 01:30 UTCJul 14, 02:20 UTC50m
2026-07-13 N646CB - Jul 13, 21:20 UTCJul 13, 21:55 UTC35m
2026-07-10 N646CB - Jul 10, 01:25 UTCJul 10, 03:00 UTC1h 35m
2026-07-09 N646CB - Jul 9, 22:30 UTCJul 9, 23:40 UTC1h 10m
2026-07-09 N646CB - Jul 9, 20:10 UTCJul 9, 21:50 UTC1h 40m
2026-07-09 N646CB LGB → LGB Jul 9, 00:25 UTCJul 9, 01:25 UTC1h 0m
2026-07-08 N646CB - Jul 8, 19:20 UTCJul 8, 20:40 UTC1h 20m
2026-07-08 N646CB LGB → LGB Jul 8, 17:25 UTCJul 8, 18:05 UTC40m
2026-07-08 N646CB - Jul 8, 15:40 UTCJul 8, 16:40 UTC1h 0m
2026-07-08 N646CB - Jul 8, 01:10 UTCJul 8, 01:30 UTC20m
2026-07-07 N646CB - Jul 7, 23:20 UTCJul 8, 00:25 UTC1h 5m
2026-07-07 N646CB - Jul 7, 19:05 UTCJul 7, 19:35 UTC30m
2026-07-07 N646CB - Jul 7, 16:05 UTCJul 7, 17:00 UTC55m
2026-07-06 N646CB - Jul 6, 19:55 UTCJul 6, 20:10 UTC15m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N646CB page for operator, model, and routing details .

Mode-S A87BB9 frequently asked

What is Mode-S code A87BB9?
A87BB9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N646CB.
Where is Mode-S A87BB9 registered?
Mode-S code A87BB9 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A87BB9 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A87BB9, octal 52075671, decimal 11,041,721.
What flights does A87BB9 operate?
Mode-S A87BB9 has broadcast 1 distinct callsign, including N646CB.